Vertical Crankshaft in an Horizontal Engine

#1
Has anyone had success using a crankshaft from a vertical shaft engine (lawn mower) in a mini bike engine, Briggs or Tecumseh?
I realize that the crankshaft snout may have to be machined and keyed to 3/4" to accept a clutch or torque converter.
Maybe this would help those members that are looking for a rare 4hp crank?
 
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